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Finding the Fourth Proportional to 12,750.80, 19,126.20 and 11,541.20

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Solution

The fourth proportional to 12,750.80, 19,126.20 and 11,541.20 is: 17,311.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.80 : 19,126.20 = 11,541.20 : x
  2. Step 2: Convert to fraction form
    12,750.80/19,126.20 = 11,541.20/x
  3. Step 3: Cross multiply
    12,750.80x = 19,126.20 × 11,541.20
  4. Step 4: Simplify right side
    12,750.80x = 220,739,299.44
  5. Step 5: Solve for x
    x = 220,739,299.44/12,750.80
  6. Step 6: Final answer
    x = 17,311.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.